/// <summary>
/// Takes the path to a file and returns a 128-bit hash of that file.
/// </summary>
/// <param name="filePath">Path to file that is to be hashed.</param>
/// <param name="options">The value in this column must be 0. This parameter is reserved for future use.</param>
/// <param name="hash">Int array that receives the returned file hash information.</param>
internal static void GetFileHash(string filePath, int options, out int[] hash)
{
MSIFILEHASHINFO hashInterop = new MSIFILEHASHINFO();
hashInterop.FileHashInfoSize = 20;
int error = MsiInterop.MsiGetFileHash(filePath, Convert.ToUInt32(options), hashInterop);
if (0 != error)
{
throw new MsiException(error);
}
Debug.Assert(20 == hashInterop.FileHashInfoSize);
hash = new int[4];
hash[0] = hashInterop.Data0;
hash[1] = hashInterop.Data1;
hash[2] = hashInterop.Data2;
hash[3] = hashInterop.Data3;
}